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Map over object preserving keys
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With Underscore
Underscore provides a function _.mapObject to map the values and preserve the keys.
_.mapObject({ one: 1, two: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, three: 9 }
DEMO
With Lodash
Lodash provides a function _.mapVa...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...s paired with a case of a regular single ellipsis.
template<typename _Res, typename... _ArgTypes>
struct _Weak_result_type_impl<_Res(_ArgTypes...)>
{ typedef _Res result_type; };
template<typename _Res, typename... _ArgTypes>
struct _Weak_result_type_impl<_Res(...
How to fix HTTP 404 on Github Pages?
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I had just one commit with all my files. I pushed an empty commit, refreshed the page and it worked.
git commit --allow-empty -m "Trigger rebuild"
git push
If this doesn't work, as @Hendrikto pointed out in the comments, check out the Github status ...
How do I use cascade delete with SQL Server?
...o perform cascading delete in SQL Server when a record from T1 is deleted, all associated records in T2 also deleted.
8 An...
postgresql list and order tables by size
How can I list all the tables of a PostgreSQL database and order them by size ?
7 Answers
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为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...an application that uses the static libcurl library, you must
add -DCURL_STATICLIB to your CFLAGS. Otherwise the linker will look for
dynamic import symbols. If you get linker error like "unknown symbol
__imp__curl_easy_init ..." you have linked against the wrong (static)
library. If you...
vs2010编译boost若干问题解决 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...径——“C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_ia64”。再次运行“bootstrap.bat”,提示找不到“mspdb100.dll”,继续在环境变量中添加了路径——“C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE ”。
继续编译，还是不过...
Why use a public method in an internal class?
...presents the key, documented functionality provided by this object."
Basically, my attitude is: suppose I decided to make this internal class into a public class. In order to do that, I want to change exactly one thing: the accessibility of the class. If turning an internal class into a public clas...
Build and Version Numbering for Java Projects (ant, cvs, hudson)
...c build numbering and version number management in Java projects? Specifically:
9 Answers
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Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...ferent domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different when you want to do a cross-domain request. A tutorial about how to achieve that is Using CORS.
When you are using postman the...